I started my period a few pp even with nursing. The first two months were regular cycles, the next was about 5 days late, then the next couple months were regular cycles again. Now I'm 14 days late. Two days ago I had really bad cramping, and some type of pressure in my rectum (like couldn't sit down for a while). I still haven't started. I've had quite a few dizzy spells today. I've taken MULTIPLE hpt's over the last two weeks (including today) and all are negative.